Method of preparing cutting and scoring matrices for printing presses



C. W. BRITCHER.

METHOD OF PREPARING CUTTING AND SCORING MATRICES FOR PRINTING PRESSES.

APPLICATION FILED JUNE 30 1919.

1,416,682., Patented May23,1922.

I N. l

1 N s m ill I 1mm COCK PRINTING 151 IF ENGFIELD.

QTJ'FAGTUBING- CGMEANY, Q1 CONNECTICUT.

.EJIAJSSJACH'USETTS. ASSICT'NOR .TO B

OF NEW] LGNIDUN, C

BIETHUID O33 PREPilRET'G GU'TTING AND SCORING MATRICES FDR "EFTEiIhT'lIl'M-I' ERESSES.

ioness.

- T0 (1% whom it may concern -method of preparing scoring and cutting devices for printing presses. more particularly the acket and matrix with which the cutting and SCOIHlg' rules cooperate to cutand score heavy paper or cardboard.

The ordinary method at present followed in preparing a. printing press for Putting and scoringhezivy paper or cardboard from which folding boxes and various articles are made, consists in setting up 2-. iorm of cutting and scoring rules in a. printing chase, suitable furniture and quoins being employed to retain the rules in place in the chase. These rul s, it may he stated. set in the chase on edge. and the cutting rules. i. e., those which are ho out through the cardboard have sl ii-p edges for cutting, whereas. the scorin rules which are slightly lower than the cutting rules, have rounded or dull top edges. *5 is necessa y" to prepare u inatri for she rules. consis of s ps1, generslly of heavy nianilis. paper, which is cured fast to the cylinder inches and which is out or routed out to correspond with the scoring rules to permit the sewing rules to press the stock slightly inio the matrix. It has been the custom to prepare mis matrix on the cyiincier' of the printing press. Where 'While on the priniin ous devices on or less in the Way 0 Specification of Letters Patent.

Bipolieetion filed lions 8 3, 1919. Serial lie.

MEN).

The object oi my invention is to provioe a methodof preparing" the nniirix whereby ihe shove objections may be avoided. i nder the present method the hinting press may be continued in use (on some other job) while the cutting and scoring matrix is heing; prepared so that the press not necessarily rendered idle While the matrix for :1 cutting and scoring job is being prepared. Furthermore, the worlr of actually preparing the inairix is made easier as all perks of it are more accessible for the Workers While they are routing out.

in the application of English Ser. No. 307.798 there is shown a. removable jacket for printing presses, which is very convenient in carrying out my process and I prefer to use that crevi in my present method though i do not n 1 to be understood limit-111g myself to the use of any particular apparatus.

In the drzuving forming; part of this ap plicution.

Figure l is an and elevation and. .i igui'e 2 is ii from: elevation of aduniniy cyl' ider on which the routing: oi he matrix nieyhe done.

The first step in my in I process is to prepare the rules for cutsiir and scoring for the particular piece oi Work or job. This is done by selecting or preparing the noses-- sary cutting and scoring rul and furniture and setting up the 'iorni in the chase and looking it in the some manner as heretofore. The rules may be straight, rurved of both, and they may be arranged io providefor cutting and scoring; {my simple or intriczififi designs and in this respect che preparation of the rules in the chase may follow the present practice. it is understood that the cutting rules have sharp top edgges'wherous. the scoring rules have dull or rounded top edges and the former projeri a lien" thou sandths oi an inch than the his The chase iiih she ruies locied therein is then attached on the bed oi a regular printing press on which the job is o he finally run. A r move. 'wl s he such is shown 111 said ice-hon F.

e eyiineer 01:

in manner Er 'iish is attached to in pr, Eng press prei shown in the and in such s moved from the press to permit any otherthat the make ready is not preparml until the matrix is finally prepared for use.

However, some make ready may be prepared by padding the jacket in order that the cutting miles will. cut through the matrix sheet and stop just at the surface of the jacket. In that case the make ready is glued to the under side of the acket so that it will be removed with the jacket. It is not necessary to prepare this partial make ready as all the make ready may be prepared when the jacket has been returned to the press.

As above stated, an impression ot the rules is now taken. This may be done by inking the form by means of a hand operated inking roller. The cylinder and bed of the printing press are then moved so that an impression of the rules is taken upon the matrix sheet. At some places or at all places the cutting rules may cut through the matrix sheet as far as the metal jacket but if no make ready has thus far been prepared all parts of the cutting rules may not pass entirely through the matrix sheet, but where they do not cut through there will be an ink impression showing the location of the cutting rules. The ink impression will show on the matrix sheet the location and shape of every scoring rule. i

The jacket and matrix sheet are now re moved from the printing press and they are mounted temporarily on a. dummy support. such as the device shown in Figures 1 and The chase containing the form may also.

be removed from the bed of the printing press. Some other form and another jacket or a blanket may be attached to the print-- ing press and the latter may be used to print. or cut and score on some other job while the matrix referred to is being routed on the dummy device. Thus far the time of the press has been taken up only to secure an impression of the scoring and cutting rules on the matrix sheet and this required but a small period of time. From now on and until the scoring and cutting matrix is ready the press may be used for other work. The preparation or routing of this matrix may take hours and even days to prepare, during which time the printing press may be used for other Work.

The jacket and matrix sheet are now mounted on the dummy device which latter may he a simple form of support as shown in Figures 1 and 2. This consists of a cylinder 1 about the same size as thecylinder of the printing press, and this is mounted on a shaft 2 supported in uprights 3 of a frame 4. There is a haudwheel 5 by means of which the cylinder 1 may be revolved, and there is a lever 6 for locking the cylinder against rotation. The jacket is secured at one end by the clamps 7 and at the other by turnbiwkles 8. so that it lies snugly against the periphery of the cylinder 1. V V

The routing out of the matrix sheet is carried on while the jacket andv sheet are mounted on the dummy device. The routing will be done along the lines represented by the impression markings on the matrix sheet and the routing may be done with a knife,

or wheel, in the manner well known in the art. It may be noted that this-routing consists in cutting away orremoving part of the matrix sheet along the lines marked by the scoring rules to provide depressions in the matrix. While the matrix is being routed on this dummy device all parts of it are accessible to the workman whereas, in routing on the printing press there is ;not alwayssufficient space to allow freedom for the workman. l

When the routing has been completed the jacket and matrix are returned to the printing press. It the chase containing the form was removed from the printing press while the routing, was being done it will now be returned and mounted on the bed of the press. The jacket and matrix will be secured in place on the printing press cylinder. The pressman will now prepare the make ready. The jacket may be padded locally or the rules themselves may be underlaid and as make ready is Well known in the art a dc tailed description thereof is not here neces sary.

When the make ready is completed the press will be ready for the scoring and cutting operation.

From the above it will be apparent that instead of the printing press remaining idle whilethe routing of the matrix is taking place and which sometimes takes a day or more, the ress simply remains idle or non productlve for'the brief period required to take an impression and to remove and replace the jacket. Furthermore, the work man has more freedom for routing the,

mechanism is omitted.

a release scoring matrix for presses, which consists rules,.upon a matrix sheetattached to a rer,

of first taking an impression on. the press from a form containing cuttlng and scoring movable cylinder jacket, removing the jacket and matrix sheet to a separate ordummy support, preparing or routing the matrix sheet While said jacket is removed from.

the press,- and afterwards returning said :jacket and the matrix to the press whereby ;.the latter may be operated for cutting and scoring.

2. The method of preparing acutting and scoring matrix for presses, which consists of first taking an impression on a press from a form containing cutting and scoring rules, upon a matrix s'heet attached to a removable cylinder jacket, removing the jacket and matrix sheet to a separate or dummy support, preparing or routing the matrix sheet while said jacket is removed from the press, afterwards returning said jacket and matrix to the press and preparing the make ready after said jacket and matrix have been returned to the press.

Signed at Springfield, in the county of Hampden and State of Massachusetts, this 22nd day of May, 1919.

CHARLES BRITCHEE. 

